Packing for shafts



Patented d 19, l@28.

UNITED STATES- PATENT OFFICE.

WILLIAM H. BAX'IER, OFFORT WAYNE, INDIANA, ASSIGNOR TO WAYNE COMPANY, OI

FORT WAYNE, INDIANA, A CORPORATION OF INDIANA.

PACKING FOR SHAFTS.

Application, filed July 1,

My invention relates to compressors for handling gases and particularlyfor those used in refrigerating apparatus, especially that for domesticuse. u

The principal object of this invention 1s to provide an eflicientpacking for the crank shaft of a refrigerating apparatus, such a.packing as will prevent leakage of either refrigerant or lubricant fromthe compressor casing aroundthe crank shaft.

Another object is to provide a simple, easily assembled and sturdy formof shaft packing by the use of a resilient longitudinally compressible,circumferentially-corrugated, cylindrical packing around said shaftwithout any separate co-acting spring. The necessary spring pressure issupplied by the i said cylindrical packing.

Another object of the invention is to use the pressure in the compressorcasing to help seal the crank shaft packing.

In the particular embodiment of my invention selected for illustration,

Figure 1 shows the casing of a refrigerating apparatus for domestic usein vertical section taken axially of the crank shaft bearing, the shaftitself being shown in full and parts of the ap aratus unnecessary to anunderstanding of broken away, and

Fig. 2, a detail, is a cross section on the line 22 of Fig. 1.

Referring now to the drawing, C is the main portion of the compressorcasing withan opening 0, adapted to be closed by a plate C secured inposition by cap screws and rovided with a sleeve 0 to form a hearing orthe crank shaft S, and has internal longitudinal grooves 0. Within thecasing the crank shaft S drives a com ressor piston connecting rod p.The shaft 8 has a shoulder at s and anotherats The sleeve 0*- thisinvention being 7 The plateC has a boss a bored at c- 1928. Serial No.119,787.

the collar d which seats on the gasket G and to which a suitable lengthof resilient, longitudinally-compressible, circumferentially groovedsheet metal D is hermetically sealed at one end while at its other endit is similarly sealed to an annular cap d. The resilient bearingassembly has at its outer end a sealing ring d which co-acts with asealing sleeve (i which is pressed inwardly by the hub f of the flywheel F against the outer end of the sealing ring d and the shoulder sof the shaft S. The hub of the fly wheel F is retained in position y alock washer s and a nut 8.

An oil assage b is provided to permit the flow of liquid from thecompressor chamber and through the grooves a and annular chamber 0 intothe resilient bearing assembly consistin of d D and d affording meansfor uti izin the pressure in the compressor casing to elp seal thecrankshaft packing.

Numerous changes may be made in the design of th shaft packing hereshown and described without departing from the spirit of my invention,all of which'I claim.

I claim as my invention and desire to secure by Letters Patent of theUnited States 1. In combination with a compressor havcrank shaft withinsaid casing and passing through said aperture, an annular shoulder onsaid shaft, a closure plate for said aperture surrounding said shaft, athrust plate bearing against said annular shoulder, a gasket seatedagainst said thrust plate and a collar seated against said gasket,removable means for rigidly pressing said collar against said gasket, alongitudinally expansible circumferentially corrugated flexible sleevehermetically sealed at one of its ends to said collar, an annular caphermetically sealed to the other end of said corrugated sleeve, asealing ring coacting with said cap, a sealing sleeve bearing againstsaid sealing ring, removable means for pressing said sealing sleeveagainst said sealingring and means for lubricating said shaft, sealingring and sealing sleeve from within the casing.

2. In combination with a compressor hav- I ing a casing provided with anaperture, a crank shaftprojectin through said aperture, outwardly fshoulders on said shaft, a closure plate for said aperture and aninternally threaded boss on said plate, a sleeve Within said plateterminating short of the, inner shoulder onsaid shaft and oil grooves onthe bore of said sleeve, a thrust plate seated against the innershoulder on said shaft and havin a passage therethrough continuing saioil passage, a gasket seated against said thrust plate and a collarseated against said gasket, an axially bored nut coacting with saidthreaded boss on said late and securing said collar against said gasketand thrust plate, a resilient longitudinally compressiblecircumferentially corrugated sleeve hermetically sealed at one of itsends to said collar, an annular cap hermetically sealed to the other endof said corrugated sleeve, a sealing ring seated in the bore of said capa sealing sleeve bearing against said sealing, ring and means formaintaining said sealing sleeve against said sealing ring.

In testimony whereof I have hereunto set my hand.

WILLIAM M. BAXTER.

